Originally Posted by
fireflybob
Define "heavy"! It's impossible to give a finite answer to your question because it depends on many factors such as actual weight, runway slope and surface, V1, flap setting etc.
Or, to put it another way, it's perfectly possible to give an answer if those variables are known.
I'm with the OP - if, for whatever reason, the aircraft's acceleration on the runway was such that, at V1, there was less remaining TORA available than the required stopping distance (no stopway at BRS), then something had gone seriously wrong.
Of course whether or not that was the case isn't something that can be reliably established from a YouTube video.